Journal article
High-resolution, low-latency, bunch-by-bunch feedback system for nanobeam stabilization
- Abstract:
- We report the design, operation, and performance of a high-resolution, low-latency, bunch-by-bunch feedback system for nanobeam stabilization. The system employs novel, ultralow quality-factor cavity beam position monitors (BPMs), a two-stage analog signal down-mixing system, and a digital signal processing and feedback board incorporating a field-programmable gate array. The field-programmable gate array firmware allows for the real-time integration of up to fifteen samples of the BPM waveforms within a measured latency of 232 ns. We show that this real-time sample integration improves significantly the beam position resolution and, consequently, the feedback performance. The best demonstrated real-time beam position resolution was 19 nm, which, as far as we are aware, is the best real-time resolution achieved in any operating BPM system. The feedback was operated in two complementary modes to stabilize the vertical position of the ultrasmall beam produced at the focal point of the ATF2 beamline at KEK. In single-BPM feedback mode, beam stabilization to 50±5 nm was demonstrated. In two-BPM feedback mode, beam stabilization to 41±4 nm was achieved.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 2.4MB, Terms of use)
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- Publisher copy:
- 10.1103/physrevaccelbeams.25.022801
Authors
+ Science and Technology Facilities Council
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- Grant:
- PP/E002862/1
- ST/P002048/1
- ST/G502512/1
- Publisher:
- American Physical Society
- Journal:
- Physical Review Accelerators and Beams More from this journal
- Volume:
- 25
- Issue:
- 2
- Article number:
- 22801
- Publication date:
- 2022-02-22
- Acceptance date:
- 2022-02-11
- DOI:
- EISSN:
-
2469-9888
- Language:
-
English
- Keywords:
- Pubs id:
-
1240767
- Local pid:
-
pubs:1240767
- Deposit date:
-
2022-02-23
- ARK identifier:
Terms of use
- Copyright holder:
- Bett et al.
- Copyright date:
- 2022
- Rights statement:
- ©2022 The Author(s). Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
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